feat: add UI component files and navigation structure

Added various UI components and navigation elements including:
- Section cards and selection components
- Social icon SVGs with horizontal/vertical text variants
- Table, tabs, and toggle components
- Site header and sidebar components
- Tooltip and unauthorized page
- Project configuration files (tsconfig.json)
- Route handlers for health checks
- Utility and hook functions for mobile responsiveness

components/site-header.tsx

@@ -0,0 +1,27 @@
+import { Button } from "@/components/ui/button"
+import { Separator } from "@/components/ui/separator"
+import { SidebarTrigger } from "@/components/ui/sidebar"
+
+export function SiteHeader() {
+  return (
+    <header className="flex h-(--header-height) shrink-0 items-center gap-2 border-b transition-[width,height] ease-linear group-has-data-[collapsible=icon]/sidebar-wrapper:h-(--header-height)">
+      <div className="flex w-full items-center gap-1 px-4 lg:gap-2 lg:px-6">
+        <SidebarTrigger className="-ml-1" />
+        <Separator orientation="vertical" className="mx-2 data-[orientation=vertical]:h-4" />
+        <h1 className="text-base font-medium">Documents</h1>
+        <div className="ml-auto flex items-center gap-2">
+          <Button variant="ghost" asChild size="sm" className="hidden sm:flex">
+            <a
+              href="https://github.com/shadcn-ui/ui/tree/main/apps/v4/app/(examples)/dashboard"
+              rel="noopener noreferrer"
+              target="_blank"
+              className="dark:text-foreground"
+            >
+              GitHub
+            </a>
+          </Button>
+        </div>
+      </div>
+    </header>
+  )
+}